Bulls guard Derrick Rose sustained an injury to his right knee against the Portland Trail Blazers on Friday night.

Subsequent examinations and an MRI confirmed a medial meniscus tear to his right knee, which will require surgery. Rose is out indefinitely, and will not accompany the team on the rest of its current road trip.

According to Yahoo Sports, “It is unclear when – or if – Rose will return this season. If Rose decides to reattach the meniscus – usually the route taken by young players – he’ll be expected to miss the rest of the regular season. To clip off the meniscus is a riskier long-term issue, but could have Rose back in one to two months.”

And AFP reports: “He showed flashes of his former MVP form on Friday, but late in the third quarter, when a pass from team-mate Joakim Noah was picked off by Nicolas Batum, Rose stepped awkwardly as he tried to get back on defense and hyper-extended his right knee. After hobbling to the bench he was helped the locker room. “He has pain and it felt like he couldn’t push off his right knee,” Thibodeau said.”